code giải phương trình bậc 2
#include “stdio.h” #include “math.h” #include “conio.h” void main() { clrscr(); printf(“\n------------------------------------------------------”) ; printf(“\n chuong trinh giai phuong trinh bac 2 : HuanBuiThanh “) ; printf(“\n ------------------------------------------------------”) ; float a,b,c,x1,x2,delta; printf(“\nNhap a : “); scanf(“%f”, &a); printf(“\nNhap b : “); scanf(“%f”, &b); printf(“\nNhap c : “); scanf(“%f”, &c); printf(“\n ——————————–”); if (a==0) { if(b==0) { if(c==0) printf(“\n pt vo so nghiem \n”); else printf(“\n pt vo nghiem \n”); } else printf(“\n pt co nghiem x=%f “,-c/b); } else delta=(b*b-4*a*c); if (delta>0) { printf(“\nNghiem x1 la: %.2f”,-b+sqrt(delta)/2*a); printf(“\nNghiem x2 la: %.2f\n\n”,-b-sqrt(delta)/2*a); } if (delta==0) printf(“\nPhuong trinh da cho co 1 nghiem kep: %.2f\n\n”,-b/2*a); if (delta<0) printf(“\nPhuong trinh da cho vo nghiem\n\n”); getch();